mg2d: add a function for getting maximum supported fd_stencil

This is needed for the caller to know the number of boundary zones that
can be filled.

API bump.

1 files changed, 5 insertions, 0 deletions

diff --git a/mg2d.h b/mg2d.h
index f697b76..834e717 100644
--- a/mg2d.h
+++ b/mg2d.h
@@ -302,4 +302,9 @@ void mg2d_solver_free(MG2DContext **ctx);
  */
 void mg2d_print_stats(MG2DContext *ctx, const char *prefix);
 
+/**
+ * @return maximum supported value of fd_stencil.
+ */
+unsigned int mg2d_max_fd_stencil(void);
+
 #endif /* MG2D_H */